Imported nx-X11-3.1.0-1.tar.gznx-X11/3.1.0-1

Summary: Imported nx-X11-3.1.0-1.tar.gz
Keywords:

Imported nx-X11-3.1.0-1.tar.gz
into Git repository

1 files changed, 225 insertions, 0 deletions

diff --git a/nx-X11/lib/X11/LuvGcLC.c b/nx-X11/lib/X11/LuvGcLC.c
new file mode 100644
index 000000000..a3cc0f68b
--- /dev/null
+++ b/nx-X11/lib/X11/LuvGcLC.c
@@ -0,0 +1,225 @@
+/* $Xorg: LuvGcLC.c,v 1.3 2000/08/17 19:44:41 cpqbld Exp $ */
+
+/*
+ * Code and supporting documentation (c) Copyright 1990 1991 Tektronix, Inc.
+ * 	All Rights Reserved
+ * 
+ * This file is a component of an X Window System-specific implementation
+ * of XCMS based on the TekColor Color Management System.  Permission is
+ * hereby granted to use, copy, modify, sell, and otherwise distribute this
+ * software and its documentation for any purpose and without fee, provided
+ * that this copyright, permission, and disclaimer notice is reproduced in
+ * all copies of this software and in supporting documentation.  TekColor
+ * is a trademark of Tektronix, Inc.
+ * 
+ * Tektronix makes no representation about the suitability of this software
+ * for any purpose.  It is provided "as is" and with all faults.
+ * 
+ * TEKTRONIX DISCLAIMS ALL WARRANTIES APPLICABLE TO THIS SOFTWARE,
+ * INCLUDING THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
+ * PARTICULAR PURPOSE.  IN NO EVENT SHALL TEKTRONIX BE LIABLE FOR ANY
+ * SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER
+ * RESULTING FROM LOSS OF USE, DATA, OR PROFITS, WHETHER IN AN ACTION OF
+ * CONTRACT, NEGLIGENCE, OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
+ * CONNECTION WITH THE USE OR THE PERFORMANCE OF THIS SOFTWARE.
+ *
+ *	NAME
+ *		CIELuvGcLC.c
+ *
+ *	DESCRIPTION
+ *		Source for XcmsCIELuvClipLuv() gamut
+ *		compression function.
+ */
+/* $XFree86: xc/lib/X11/LuvGcLC.c,v 1.3 2001/01/17 19:41:39 dawes Exp $ */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+#include "Xlibint.h"
+#include "Xcmsint.h"
+#include <math.h>
+#include "Cv.h"
+
+/*
+ *	INTERNALS
+ *		Internal defines that need NOT be exported to any package or
+ *		program using this package.
+ */
+#define MAXBISECTCOUNT	100
+
+
+/************************************************************************
+ *									*
+ *			 PUBLIC ROUTINES				*
+ *									*
+ ************************************************************************/
+
+/*
+ *	NAME
+ *		XcmsCIELuvClipLuv - Return the closest L* and chroma
+ *
+ *	SYNOPSIS
+ */
+/* ARGSUSED */
+Status
+XcmsCIELuvClipLuv (ccc, pColors_in_out, nColors, i, pCompressed)
+    XcmsCCC ccc;
+    XcmsColor *pColors_in_out;
+    unsigned int nColors;
+    unsigned int i;
+    Bool *pCompressed;
+/*
+ *	DESCRIPTION
+ *		This routine will find the closest L* and chroma 
+ *		for a specific hue.  The color input is converted to
+ *		CIE L*u*v* format and returned as CIE XYZ format.
+ *
+ *		Since this routine works with the L* within
+ *		pColor_in_out intermediate results may be returned
+ *		even though it may be invalid.
+ *
+ *	RETURNS
+ *		XcmsFailure - Failure
+ *              XcmsSuccess - Succeeded
+ *
+ */
+{
+    Status retval;
+    XcmsCCCRec	myCCC;
+    XcmsColor	*pColor;
+    XcmsColor	Luv_max;
+    XcmsFloat	hue, chroma, maxChroma;
+    XcmsFloat	Chroma, bestChroma, Lstar, maxLstar, saveLstar;
+    XcmsFloat	bestLstar, bestustar, bestvstar;
+    XcmsFloat	nT, saveDist, tmpDist;
+    XcmsRGBi	rgb_max;
+    int		nCount, nMaxCount, nI, nILast;
+
+    /* Use my own CCC */
+    memcpy ((char *)&myCCC, (char *)ccc, sizeof(XcmsCCCRec));
+    myCCC.clientWhitePt.format = XcmsUndefinedFormat;/* inherit screen white */
+    myCCC.gamutCompProc = (XcmsCompressionProc)NULL;/* no gamut compression func */
+
+    /*
+     * Color specification passed as input can be assumed to:
+     *	1. Be in XcmsCIEXYZFormat
+     *	2. Already be white point adjusted for the Screen White Point.
+     *	    This means that the white point now associated with this
+     *	    color spec is the Screen White Point (even if the
+     *	    ccc->clientWhitePt differs).
+     */
+
+    pColor = pColors_in_out + i;
+
+    if (ccc->visual->class < StaticColor) {
+	/*
+	 * GRAY !
+	 */
+	_XcmsDIConvertColors(ccc, pColor, ScreenWhitePointOfCCC(ccc),
+		1, XcmsCIELuvFormat);
+	_XcmsDIConvertColors(ccc, pColor, ScreenWhitePointOfCCC(ccc),
+		1, XcmsCIEXYZFormat);
+	if (pCompressed) {
+	    *(pCompressed + i) = True;
+	}
+	return(XcmsSuccess);
+    }
+
+    /* Convert from CIEXYZ to CIELuv format */
+    if (_XcmsDIConvertColors(&myCCC, pColor,
+		            ScreenWhitePointOfCCC(&myCCC), 1, XcmsCIELuvFormat)
+		== XcmsFailure) {
+	return(XcmsFailure);
+    }
+
+    /* Step 1: compute the maximum L* and chroma for this hue. */
+    /*         This copy may be overkill but it preserves the pixel etc. */
+    saveLstar = pColor->spec.CIELuv.L_star;
+    hue = XCMS_CIELUV_PMETRIC_HUE(pColor->spec.CIELuv.u_star,
+				  pColor->spec.CIELuv.v_star);
+    chroma = XCMS_CIELUV_PMETRIC_CHROMA(pColor->spec.CIELuv.u_star,
+					pColor->spec.CIELuv.v_star);
+    memcpy((char *)&Luv_max, (char *)pColor, sizeof(XcmsColor));
+    if (_XcmsCIELuvQueryMaxLCRGB (&myCCC, hue, &Luv_max, &rgb_max) 
+	    == XcmsFailure) {
+	return (XcmsFailure);
+    }
+    maxLstar = Luv_max.spec.CIELuv.L_star;
+	
+    /* Now check and return the appropriate L* */
+    if (saveLstar == maxLstar) {
+	/* When the L* input is equal to the maximum L* */
+	/* merely return the maximum Luv point. */
+	memcpy((char *)pColor, (char *)&Luv_max, sizeof(XcmsColor));
+	retval = _XcmsDIConvertColors(&myCCC, pColor,
+		           ScreenWhitePointOfCCC(&myCCC), 1, XcmsCIEXYZFormat);
+    } else {
+	/* return the closest point on the hue leaf. */
+	/* must do a bisection here to compute the delta e. */
+	maxChroma = XCMS_CIELUV_PMETRIC_CHROMA(Luv_max.spec.CIELuv.u_star,
+					       Luv_max.spec.CIELuv.v_star);
+	nMaxCount = MAXBISECTCOUNT;
+	nI = nMaxCount / 2;
+	bestLstar = Lstar = pColor->spec.CIELuv.L_star;
+	bestustar = pColor->spec.CIELuv.u_star;
+	bestvstar = pColor->spec.CIELuv.v_star;
+	bestChroma = Chroma = chroma;
+	saveDist = XCMS_SQRT(((Chroma - maxChroma) * (Chroma - maxChroma)) +
+			     ((Lstar - maxLstar) * (Lstar - maxLstar)));
+	for (nCount = 0; nCount < nMaxCount; nCount++) {
+	    nT = (XcmsFloat) nI / (XcmsFloat) nMaxCount;
+	    if (saveLstar > maxLstar) {
+		pColor->spec.RGBi.red   = rgb_max.red * (1.0 - nT) + nT;
+		pColor->spec.RGBi.green = rgb_max.green * (1.0 - nT) + nT;
+		pColor->spec.RGBi.blue  = rgb_max.blue * (1.0 - nT) + nT;
+	    } else {
+		pColor->spec.RGBi.red   = rgb_max.red - (rgb_max.red * nT);
+		pColor->spec.RGBi.green = rgb_max.green - (rgb_max.green * nT);
+		pColor->spec.RGBi.blue  = rgb_max.blue - (rgb_max.blue * nT);
+	    }
+	    pColor->format = XcmsRGBiFormat;
+
+	    /* Convert from RGBi to CIE Luv */
+	    if (_XcmsConvertColorsWithWhitePt(&myCCC, pColor,
+	                    ScreenWhitePointOfCCC(&myCCC), 1, XcmsCIELuvFormat,
+			    (Bool *) NULL) == XcmsFailure) {
+		return (XcmsFailure);
+	    }
+	    chroma = XCMS_CIELUV_PMETRIC_CHROMA(pColor->spec.CIELuv.u_star,
+					        pColor->spec.CIELuv.v_star);
+	    tmpDist = XCMS_SQRT(((Chroma - chroma) * (Chroma - chroma)) +
+				((Lstar - pColor->spec.CIELuv.L_star) *
+				 (Lstar - pColor->spec.CIELuv.L_star)));
+	    nILast = nI;
+	    if (tmpDist > saveDist) {
+		nI /= 2;
+	    } else {
+		nI = (nMaxCount + nI) / 2;
+		saveDist = tmpDist;
+		bestLstar = pColor->spec.CIELuv.L_star;
+		bestustar = pColor->spec.CIELuv.u_star;
+		bestvstar = pColor->spec.CIELuv.v_star;
+		bestChroma = chroma;	    
+	    }
+	    if (nI == nILast || nI == 0) {
+		break;
+	    }
+	}
+	if (bestChroma >= maxChroma) {
+	    pColor->spec.CIELuv.L_star = maxLstar;
+	    pColor->spec.CIELuv.u_star = Luv_max.spec.CIELuv.u_star;
+	    pColor->spec.CIELuv.v_star = Luv_max.spec.CIELuv.v_star;
+	} else {
+	    pColor->spec.CIELuv.L_star = bestLstar;
+	    pColor->spec.CIELuv.u_star = bestustar;
+	    pColor->spec.CIELuv.v_star = bestvstar;
+	}
+	retval = _XcmsDIConvertColors(&myCCC, pColor,
+		           ScreenWhitePointOfCCC(&myCCC), 1, XcmsCIEXYZFormat);
+
+	if (retval != XcmsFailure && pCompressed != NULL) {
+	    *(pCompressed + i) = True;
+	}
+    }
+    return(retval);
+}